Yamaha Banshee 421cc ARES Athena-Style Cylinder Kit BPRATV CP Pistons Stroker +4 KLX300 Kibblewhite's valves are the ultimate

Kibblewhite's valves are the ultimate upgrade for your 20+ KX250F (&F/ X/ XC)

94mm BP Racing big bore cylinder

K&N oil fliter

gaskets and titanium studs

This kit takes the guesswork out of upgrading

Yamaha Banshee 421cc ARES Athena-Style Cylinder Kit BPRATV CP Pistons Stroker +4 KLX300 Kibblewhite's valves are the ultimateComplete Banshee 421cc big bore stroker engine kit with ARES 68mm cylinders, CP pistons and Pro Design Cool Head. Athena level performance, proven value. S410485301023, S410485301024, P400485100024, 573M06800, 4111, CBK0044, PD300, 808812, 822154, BR8ES, K018, 10 301, B1005, 21. 2020, 8101D200, 2GU 11311 00 00, 2GU 11321 00 00,2GU 11181 00 00, 2GU 11631 00 94, 2GU 11610 01 00, 4L0 11633 00 00, 93450 17129 00, 93310 316D6 00,3GG 11351 02 00, B0627020F,